JP2938268B2 - Calendar processing method - Google Patents
Calendar processing methodInfo
- Publication number
- JP2938268B2 JP2938268B2 JP11265292A JP11265292A JP2938268B2 JP 2938268 B2 JP2938268 B2 JP 2938268B2 JP 11265292 A JP11265292 A JP 11265292A JP 11265292 A JP11265292 A JP 11265292A JP 2938268 B2 JP2938268 B2 JP 2938268B2
- Authority
- JP
- Japan
- Prior art keywords
- calendering
- paper
- temperature
- hot
- roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐熱紙状物の熱圧カレ
ンダー加工方法において、長時間加工しても熱圧カレン
ダーロールへの耐熱紙状物の粘着がなく、かつ電気絶縁
性や強度等の優れた品質を有する耐熱紙状物を得るため
の加工方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for hot-calendering a heat-resistant paper-like material. The present invention relates to a processing method for obtaining a heat-resistant paper-like material having excellent quality.
【０００２】[0002]
【従来の技術】従来、芳香族ポリアミドパルプおよび芳
香族ポリアミド短繊維を含む耐熱紙状物の熱圧カレンダ
ー加工方法については、特公昭３５―１１８５１号公
報、特公昭３６―１６４６０号公報、特公昭３７―５７
３２号公報等に記載されている。2. Description of the Related Art Conventionally, a method for hot-pressure calendering of heat-resistant paper containing aromatic polyamide pulp and aromatic polyamide short fibers has been disclosed in JP-B-35-11851, JP-B-36-16460, and JP-B-sho. 37-57
No. 32, and the like.
【０００３】しかしながら、上記公報に記載されている
熱圧カレンダー加工方法は長時間高温で加工した場合、
紙状物が熱圧カレンダーロールに粘着して加工性が不良
となる問題がある。[0003] However, the hot-press calendering method described in the above-mentioned publication, when processed at a high temperature for a long time,
There is a problem that the paper-like material adheres to the hot-press calender roll and the workability becomes poor.
【０００４】[0004]
【発明の目的】本発明の目的は、上記の如く耐熱紙状物
を長時間高温で熱圧カレンダー加工する際、該紙状物が
熱圧カレンダーロールに粘着するのを防止し、かつ電気
絶縁性や強度等の優れた品質を有する耐熱紙状物を得る
ためのカレンダー加工方法を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to prevent the heat-resistant paper-like material from sticking to the hot-pressure calender roll when the heat-resistant paper-like material is subjected to hot-press calendering at a high temperature for a long period of time as described above. An object of the present invention is to provide a calendering method for obtaining a heat-resistant paper having excellent quality such as strength and strength.
【０００５】[0005]
【発明の構成】本発明は、芳香族ポリアミドパルプおよ
び芳香族ポリアミド短繊維を含む紙状物を金属／金属カ
レンダーロールを用いて熱圧カレンダー加工する方法に
おいて、該紙状物を乾燥後２００℃以上２７５℃以下、
線圧５０kg／cm以上でプレカレンダー加工し、引き続き
熱圧カレンダー加工をする前に、該紙状物の温度を２７
５℃以上３５０℃以下に上昇させ、ついで２９０℃以
下、線圧５０kg／cm以上で熱圧カレンダー加工すること
を特徴とするカレンダー加工方法である。The present invention relates to a method for hot-press calendering a paper containing aromatic polyamide pulp and aromatic polyamide short fiber using a metal / metal calender roll. Not less than 275 ° C,
Pre-calendering is performed at a linear pressure of 50 kg / cm or more.
A calendering method characterized by raising the temperature to 5 ° C. or more and 350 ° C. or less, and then performing hot-pressure calendering at 290 ° C. or less and a linear pressure of 50 kg / cm or more.
【０００６】本発明において使用する芳香族ポリアミド
は従来公知の（ａ）芳香族環を有するジカルボン酸と芳
香族環を有するジアミンとの縮合ポリアミド（ｂ）芳香
族環を有するアミノカルボンを縮合ポリアミド（ｃ）前
記（ａ）（ｂ）を共重合したポリアミドなどである。The aromatic polyamide used in the present invention is a conventionally known (a) condensed polyamide of a dicarboxylic acid having an aromatic ring and a diamine having an aromatic ring, and (b) a condensed polyamide of an aminocarboxylic acid having an aromatic ring. c) Polyamide obtained by copolymerizing the above (a) and (b).
【０００７】芳香族ポリアミドパルプは例えば特公昭３
５―１１８５１号公報、特公昭３７―５７３２号公報等
に記載されているものである。[0007] Aromatic polyamide pulp is described in, for example,
No. 5,1181,851, Japanese Patent Publication No. 37-5732, and the like.
【０００８】また、芳香族ポリアミド短繊維の形態は単
糸繊度２０デニール以下、繊維長３〜６０mmの範囲のも
のが好ましい。It is preferable that the aromatic polyamide short fibers have a single fiber fineness of 20 denier or less and a fiber length of 3 to 60 mm.
【０００９】紙状物の製法は湿式が好ましいが、特に限
定されない。The method for producing the paper-like material is preferably a wet method, but is not particularly limited.
【００１０】本発明では、熱圧カレンダー加工は、金属
／金属カレンダーロールを用い２９０℃以下、線圧５０
kg／cm以上で熱圧カレンダー加工するが、その前に先
ず、紙状物中に含まれる水分を乾燥する必要がある。水
分を含んだまま熱圧カレンダー加工すると、紙状物が凹
凸状になり製品とならない。According to the present invention, the hot-press calendering is performed using a metal / metal calender roll at a temperature of 290 ° C. or less and a linear pressure of 50 ° C.
Before calendering at a pressure of kg / cm or more, first, it is necessary to dry the water contained in the paper. When hot-press calendering is performed while containing water, the paper-like material becomes uneven and does not become a product.
【００１１】乾燥後２００℃以上２７５℃以下、線圧５
０kg／cm以上でプレカレンダー加工する。プレカレンダ
ー加工時のロール温度が２００℃より低温になると、プ
レカレンダー加工時の紙状物層間接着が弱くなり、その
後のより高温度を受ける時に好ましくない影響を受け、
製品の品質を悪くする。After drying, 200 ° C. or more and 275 ° C. or less, linear pressure 5
Pre-calender at 0 kg / cm or more. When the roll temperature at the time of pre-calendering is lower than 200 ° C., the interlayer adhesion between the paper-like materials at the time of pre-calendering is weakened, which is unfavorably affected when receiving a higher temperature thereafter.
Poor product quality.
【００１２】プレカレンダー加工時のロール温度が２７
５℃より高温になると、プレカレンダー加工時の熱収縮
により紙状物の嵩密度が低くなり、それが熱圧カレンダ
ー加工後の製品にも影響を及ぼし品質を悪くすると共に
加工時には、粘着の問題も発生してくる。特に、温度が
高くなればなるほど、短時間で粘着が発生して加工性が
悪くなる。When the roll temperature during pre-calendering is 27
If the temperature is higher than 5 ° C, the bulk density of the paper-like material decreases due to heat shrinkage during pre-calendering, which affects the product after hot-press calendering, and deteriorates the quality. Also occurs. In particular, the higher the temperature, the more the tackiness occurs in a short time and the worse the processability.
【００１３】また、プレカレンダー加工時のロール線圧
が５０kg／cm未満の場合もプレカレンダー加工後の嵩密
度が低くなり、嵩密度を高くするプレカレンダー加工の
目的が達成できない。プレカレンダーのロール材質は金
属／金属ロールが好ましいが、加工温度が比較的低めな
ので金属／弾性ロールでも、弾性／弾性ロールでもよ
く、特に限定されない。Also, when the roll linear pressure during pre-calendering is less than 50 kg / cm, the bulk density after pre-calendering is low, and the purpose of pre-calendering to increase the bulk density cannot be achieved. The roll material of the pre-calender is preferably a metal / metal roll, but since the processing temperature is relatively low, it may be a metal / elastic roll or an elastic / elastic roll, and is not particularly limited.
【００１４】プレカレンダー後、紙状物の温度を２７５
℃以上３５０℃以下に上昇させる必要がある。紙状物に
熱を与える方式は、熱ロール接触方式でも熱風循環の加
熱炉方式や赤外線ヒータ等による非接触方式でもよく、
特に限定されない。After the pre-calendering, the temperature of the paper is set to 275
It is necessary to raise the temperature to at least 350 ° C. The method of applying heat to the paper-like material may be a hot roll contact method, a hot air circulation heating furnace method, or a non-contact method using an infrared heater, etc.
There is no particular limitation.
【００１５】紙状物の温度は２７５℃以上の温度が必要
であり、この温度以下では熱圧カレンダー加工後の強度
を高くすることができない。一方、３５０℃を越えると
紙状物の温度が高くなりすぎ、紙状物の収縮が大きくな
り、嵩密度が低くなり品質が低下する。The temperature of the paper-like material must be 275 ° C. or higher. If the temperature is lower than 275 ° C., it is impossible to increase the strength after hot-press calendering. On the other hand, when the temperature exceeds 350 ° C., the temperature of the paper-like material becomes too high, the shrinkage of the paper-like material increases, the bulk density decreases, and the quality deteriorates.
【００１６】紙状物の温度を２７５℃以上３５０℃以下
に保って、熱圧カレンダー加工する必要があるので、紙
状物の温度が冷却されて下がることの無いように加熱方
式は十分に考慮する必要がある。Since it is necessary to carry out hot-press calendering while maintaining the temperature of the paper-like material at 275 ° C. or more and 350 ° C. or less, the heating method should be sufficiently considered so that the temperature of the paper-like material is not lowered by cooling. There is a need to.
【００１７】なお、好ましくは紙状物の温度は２９０℃
以上３３５℃以下である。The temperature of the paper is preferably 290 ° C.
Not less than 335 ° C.
【００１８】プレカレンダー後の紙状物を加熱するプロ
セスはプレカレンダー後に引き続き連続的に実施するの
が好ましいが、プレカレンダー後に巻き取り、不連続的
に実施しても別に問題はない。The process of heating the paper-like material after the pre-calendering is preferably performed continuously after the pre-calendering, but there is no problem even if the process is wound up after the pre-calendering and performed discontinuously.
【００１９】最後に、２９０℃以下、線圧５０kg／cm以
上で熱圧加工して、カレンダー後の紙状物の品質を好ま
しいレベルまで高めることが出来るのである。なお、こ
の熱圧加工時の温度が非常に重要で２９０℃を越える温
度では長時間の連続熱圧カレンダー加工において、紙状
物がロールに粘着を起こしてしまい加工性が落ちてしま
う。プレカレンダー加工時においては２７５℃以上で粘
着が発生するが、プレカレンダー加工後において、また
紙状物の温度を２７５℃以上３５０℃以下に保っている
場合はロール温度が２９０℃まで粘着は発生しない。Finally, hot-pressing at 290 ° C. or less and a linear pressure of 50 kg / cm or more can improve the quality of the paper after calendering to a desirable level. The temperature at the time of this hot pressing is very important. If the temperature exceeds 290 ° C., the paper-like material sticks to the roll during long-time continuous hot pressing calendering, and the workability deteriorates. Adhesion occurs at 275 ° C or higher during pre-calendering. However, after pre-calendering and when the temperature of the paper is maintained at 275 ° C or higher and 350 ° C or lower, the sticking occurs until the roll temperature reaches 290 ° C. do not do.
【００２０】なお、好ましいロール温度は２８０℃以下
である。The preferred roll temperature is 280 ° C. or less.
【００２１】線圧５０kg／cm以上は紙状物の品質を保つ
ため必要な大きさである。The linear pressure of 50 kg / cm or more is a size necessary for maintaining the quality of the paper-like material.
【００２２】[0022]
【発明の効果】本発明は、耐熱紙状物を熱圧カレンダー
加工する際、熱圧カレンダーロールに該紙状物が粘着す
るのを防止し、加工性が良好で電気絶縁性や強度等の品
質の優れた耐熱紙状物を得ることができる。粘着が発生
しないので、シリコーン等の離型剤を使用する必要がな
い。粘着が発生すると、紙状物がロールに不規則に取ら
れるので、紙状物に皺が入り品位が落ち、加工性がそこ
なわれるのであるが、本発明の方法によれば全く問題が
なく加工することが出来る。According to the present invention, when a heat-resistant paper-like material is subjected to hot-press calendering, the paper-like material is prevented from sticking to a hot-press calender roll, has good workability, and has good electrical insulation and strength. A heat-resistant paper-like material having excellent quality can be obtained. Since no sticking occurs, there is no need to use a release agent such as silicone. When the sticking occurs, the paper-like material is irregularly taken up by the roll, so that the paper-like material is wrinkled and degraded, and the workability is impaired, but according to the method of the present invention, there is no problem at all. Can be processed.
【００２３】以下に実施例により本発明を更に詳しく説
明する。なお、実施例において秤量、嵩密度、強度、絶
縁破壊強度、熱収縮率、熱圧カレンダーロールーへの粘
着性は、以下の方法で評価した。 （１）秤量：ＪＩＳ―Ｐ―８１２４に従って測定した。 （２）嵩密度：ＪＩＳ―Ｃ―２１１１に従って厚みを測
定し、秤量／厚みにより嵩密度を算出した。 （３）強度：ＪＩＳ―Ｐ―８１１３に従って測定し、タ
テ、ヨコの平均値で示した。 （４）絶縁破壊強度：ＪＩＳ―Ｃ―２１１１に従って測
定した。 （５）熱収縮率：熱風乾燥機で３００℃中で１０分間に
フリーの状態で熱収縮させ、収縮前からの寸法変化を測
定し、タテ、ヨコの平均値で示した。 （６）熱圧カレンダーロールへの粘着性：幅３０cm×長
さ２０００ｍの紙状物の粘着の有無を目視判定した。Hereinafter, the present invention will be described in more detail by way of examples. In the examples, weighing, bulk density, strength, dielectric breakdown strength, heat shrinkage, and adhesion to a hot-press calender roll were evaluated by the following methods. (1) Weighing: Measured according to JIS-P-8124. (2) Bulk density: The thickness was measured according to JIS-C-2111, and the bulk density was calculated by weighing / thickness. (3) Strength: Measured according to JIS-P-8113, and expressed as the average value of vertical and horizontal. (4) Dielectric breakdown strength: Measured according to JIS-C-2111. (5) Heat shrinkage: Heat shrinkage was performed in a free state at 300 ° C. for 10 minutes using a hot air drier, and dimensional change from before shrinkage was measured. (6) Adhesion to a hot-press calender roll: The presence or absence of adhesion of a paper-like material having a width of 30 cm and a length of 2000 m was visually determined.
【００２４】[0024]
【実施例１〜３、比較例１〜５】抄紙用ポリメタフェニ
レンイソフタルアミド短繊維は、帝人（株）の市販され
ているコーネックス繊維（登録商標）の単糸繊度２デニ
ール、繊維長６mmのものを使用した。Examples 1 to 3 and Comparative Examples 1 to 5 Polymetaphenylene isophthalamide staple fibers for papermaking are commercially available from Connex Fiber (registered trademark) manufactured by Teijin Limited and have a single fiber fineness of 2 denier and a fiber length of 6 mm. Was used.
【００２５】この抄紙用ポリメタフェニレンイソフタル
アミド短繊維をパルパーにて１％濃度で分散させスラリ
ーとした。The polymetaphenylene isophthalamide short fibers for papermaking were dispersed in a pulper at a concentration of 1% to form a slurry.
【００２６】また抄紙用パルプは以下の方法により製造
した。The paper pulp was produced by the following method.
【００２７】まず特公昭４７―１０８６３号公報に記載
の界面重合法によりポリメタフェニレンイソフタルアミ
ドを製造した。このポリマーはＮ―メチル―２―ピロリ
ドンに溶解して測定した固有粘度（Ｉ．Ｖ）が１．３５
であり、ポリマー中に無機塩を全く含まない。このポリ
マーをポリマー濃度１２．５％となるようにＮ―メチル
―２―ピロリドンに溶解した。一方、Ｎ―メチル―２―
ピロリドンに水を加えて水溶液（濃度３重量％）を作成
し沈殿剤とした。First, polymetaphenylene isophthalamide was produced by the interfacial polymerization method described in JP-B-47-10863. This polymer has an intrinsic viscosity (IV) of 1.35 as measured by dissolving in N-methyl-2-pyrrolidone.
And contains no inorganic salt in the polymer. This polymer was dissolved in N-methyl-2-pyrrolidone to a polymer concentration of 12.5%. On the other hand, N-methyl-2-
Water was added to pyrrolidone to prepare an aqueous solution (concentration: 3% by weight), which was used as a precipitant.
【００２８】このポリマー溶液および沈殿剤を特開昭５
２―１５６２１号公報の記載に従いポリマー溶液注入
口、沈殿剤注入口および排出口を有する室と該室内にと
りつけられたローターと、該室の内壁に固定されたステ
ーターとからなる沈殿装置を用いて、各注入口から注入
し、前記ローターを高速回転させてパルプ化した。The polymer solution and the precipitant are disclosed in
A sedimentation apparatus comprising a chamber having a polymer solution inlet, a precipitant inlet, and an outlet, a rotor attached to the chamber, and a stator fixed to the inner wall of the chamber according to the description in JP-A-2-15621. Then, the mixture was injected from each injection port, and the rotor was rotated at a high speed to pulp.
【００２９】得られたパルプを用い、パルパー、高速離
解機、ディスクリファイナーを使用してスラリー濃度
０．３％でカナディアン標準濾水度１１０ｍｌの水性ス
ラリーを作成した。Using the obtained pulp, an aqueous slurry having a slurry concentration of 0.3% and a Canadian standard freeness of 110 ml was prepared using a pulper, a high-speed disintegrator and a disc refiner.
【００３０】次に、前記短繊維スラリーとパルプスラリ
ーとを表１のごとき混率で混合し、長網抄紙機で抄紙し
た。その後、表１のごときカレンダー加工条件にて加工
した。なお、カレンダー条件において、乾燥はロール径
８００mmの乾燥ロールで接触式で温度２２０℃で実施し
た。また、プレカレンダー加工はロール径４００mmの金
属ロールで、熱圧カレンダー加工はロール径２３０mmの
金属ロールで実施した。プレカレンダー加工、紙状物ア
ップの加温、熱圧カレンダー加工は連続的に加工速度２
５ｍ／ｍｉｎで実施した。Next, the short fiber slurry and the pulp slurry were mixed at a mixing ratio as shown in Table 1 and paper was made with a fourdrinier paper machine. Then, it processed under calendering conditions as shown in Table 1. The drying was carried out at a temperature of 220 ° C. in a contact manner with a drying roll having a roll diameter of 800 mm under the calendar conditions. The pre-calendering was performed with a metal roll having a roll diameter of 400 mm, and the hot-press calendering was performed with a metal roll having a roll diameter of 230 mm. Pre-calendering, heating of paper-up, and hot-press calendering are continuously performed at a processing speed of 2.
The test was performed at 5 m / min.
【００３１】得られた物性を表１に示す。Table 1 shows the physical properties thus obtained.
【００３２】表１に示すごとく実施例１、２、３はいず
れも強度、電気絶縁性等の優れた物性を有すると共にカ
レンダーロールへの粘着もなく良好な加工性を有してい
た。比較例１は、プレカレンダーロール加工時の紙状物
の層間接着が弱く、嵩密度も低く、熱圧カレンダー加工
後の物性も実施例に比べ不良であった。As shown in Table 1, Examples 1, 2, and 3 all have excellent physical properties such as strength and electrical insulation , and have good workability without sticking to a calender roll .
Was. In Comparative Example 1, the interlayer adhesion of the paper-like material during pre-calender roll processing was weak, the bulk density was low, and the physical properties after hot-press calendering were poorer than those of the examples.
【００３３】比較例２は、プレカレンダーロールの温度
が高いため、長時間の加工でプレカレンダーロールに粘
着が発生して、加工性が不良であった。In Comparative Example 2, since the temperature of the pre-calender roll was high, stickiness occurred in the pre-calender roll during long-time processing, and the workability was poor.
【００３４】比較例３は、紙状物の温度が低いため、粘
着が発生しない熱圧カレンダーロール温度では物性が実
施例に比べ不良であった。In Comparative Example 3, since the temperature of the paper-like material was low, the physical properties were poorer than those of the Example at the temperature of the hot-press calender roll where sticking did not occur.
【００３５】比較例４は、紙状物の温度が高いため、紙
状物の収縮が大きく、嵩密度が小さく物性が実施例に比
べ不良であった。In Comparative Example 4, since the temperature of the paper-like material was high, the shrinkage of the paper-like material was large, the bulk density was small, and the physical properties were poor as compared with the examples.
【００３６】比較例５は、熱圧カレンダーロールの温度
が高いため、熱圧カレンダーロールに粘着が発生し、加
工性が不良であった。In Comparative Example 5, since the temperature of the hot-press calender roll was high, stickiness occurred on the hot-press calender roll, and the workability was poor.
【００３７】[0037]
【表１】 [Table 1]
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) D21H 25/04 D21G 1/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) D21H 25/04 D21G 1/00
Claims (1)
リアミド短繊維を含む紙状物を金属／金属カレンダーロ
ールを用いた熱圧カレンダー加工する方法において、該
紙状物を乾燥後２００℃以上２７５℃以下、線圧５０kg
／cm以上でプレカレンダー加工し、引き続き熱圧カレン
ダー加工をする前に、該紙状物の温度を２７５℃以上３
５０℃以下に上昇させ、ついで２９０℃以下、線圧５０
kg／cm以上で熱圧カレンダー加工することを特徴とする
カレンダー加工方法。1. A method for hot-press calendering a paper containing aromatic polyamide pulp and aromatic polyamide staple fiber using a metal / metal calender roll. , Linear pressure 50kg
/ Cm or more, and before the subsequent hot-press calendering, the temperature of the paper-like material is 275 ° C. or more and 3
Raise the temperature to 50 ° C or less, then 290 ° C or less, and the linear pressure 50
A calendering method characterized in that calendering is performed at a pressure of kg / cm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11265292A JP2938268B2 (en) | 1992-05-01 | 1992-05-01 | Calendar processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11265292A JP2938268B2 (en) | 1992-05-01 | 1992-05-01 | Calendar processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05311594A JPH05311594A (en) | 1993-11-22 |
| JP2938268B2 true JP2938268B2 (en) | 1999-08-23 |
Family
ID=14592090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11265292A Expired - Lifetime JP2938268B2 (en) | 1992-05-01 | 1992-05-01 | Calendar processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2938268B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5910231A (en) * | 1997-07-22 | 1999-06-08 | E. I. Du Pont De Nemours And Company | Aramid papers of improved solvent resistance and dimensionally stable laminates made therefrom |
| JP2014237915A (en) * | 2013-05-08 | 2014-12-18 | 王子ホールディングス株式会社 | Heat resistant insulation sheet, and method for producing the same |
| JP6487904B2 (en) * | 2014-03-27 | 2019-03-20 | 株式会社クラレ | Insulating nonwoven fabric and method for producing the same, insulating material |
| EP3305982B1 (en) * | 2015-05-28 | 2020-09-09 | Kolon Industries, Inc. | Aramid paper, manufacturing method therefor, and use thereof |
-
1992
- 1992-05-01 JP JP11265292A patent/JP2938268B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05311594A (en) | 1993-11-22 |
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